Fender Blender

It's probably too late to order one for your Fourth of July fest, but thanks to the geniuses over at the Juice Peddler, you can have your drink and burn it off too. Their pedal-powered blenders range from the dedicated (and stationary) "Fender Blender" to the Mini-B3 (pictured), which fits on any bike that can carry a rear rack--even an Xtracycle. The site doesn't say how many calories you'll expend, but sadly, it's probably not as many as are in a margarita. And if you're riding while blending, better stick to smoothies.